Deadline is reporting that Once Upon a Time creators Edward Kitsis and Adam Horowitz have developed a spin-off the show focusing on Wonderland, which, should it go to series, will be executive produced by Prison Break‘s Zack Estrin and OUAT consultant Jane Espenson. Offers the report, “Details about the spinoff are being kept under wraps but I have learned that it takes place in Wonderland. While the original idea was to use Once‘s character of Mad Hatter to transition to the new world, I hear the story will now be told through the point of of view of Alice, who has not appeared on Once, surrounded by several new characters. The spinoff takes place in a post-curse world, though, like on Once, there will be flashbacks, so we could potentially see familiar faces, including Barbara Hershey’s recently departed Cora, who was the Queen Of Hearts in Once‘s Wonderland. I hear the idea is to air the spinoff in 13-episode season arcs with beginning, middle and end, similar to FX’s American Horror Story, possibly bridging the fall and spring portions of Once.” Production on the pilot is expected to begin when the OUAT season wraps.